What sellers are doing is hiding "alloy" somewhere in the description. Example on Amazon, I saw in the title "Stainless Steel Floating Lockets" but at the bottom of the page it says "Alloy".
Under comments tons of people say things like "Not as pictured" & "Stones are not set as shown". If you have seen them side by side there is a huge difference. Stainless Steel Floating Lockets are smooth with no plating.
Alloy lockets are plated and the stones are applied differently which leads to a totally different product. Alloy is more for kids or bulk gifts where you are not as concerned about quality.
Our Stainless Steel Floating Lockets are just that Stainless Steel. Make sure this is listed in the title and the description so that you get what you pay for.